/*
 * videlay
 *
 * Provides a bit more control than the original version
 *
 * © 1994-1998 Straylight
 */

/*----- Licensing note ----------------------------------------------------*
 *
 * This file is part of Straylight's Steel library.
 *
 * Steel is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2, or (at your option)
 * any later version.
 *
 * Steel is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with Steel.  If not, write to the Free Software Foundation,
 * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
 */

#include "visdelay.h"
#include "os.h"
#include "swiv.h"
#include "swis.h"
#include "wimpt.h"
#include <stdlib.h>

#include "dll.h"

#ifndef _dll_NODLL
  extern void _dllEntry(visdelay__exitHandler)(void);
#endif

static visdelay_state visdelay__state={0,-1};
static BOOL visdelay__exit;

/*
 * void visdelay__exitHandler(void)
 *
 * Use
 *  Shuts the hourglass off if we've used it
 */

_dll_static void visdelay__exitHandler(void)
{
  if (visdelay__state.count)
    wimpt_noerr(_swix(XHourglass_Off,0));
}

/*
 * void visdelay_begin(void)
 *
 * Use
 *  Starts the hourglass.
 */

void visdelay_begin(void)
{
  if (!visdelay__state.count)
  {
    wimpt_noerr(_swix(XHourglass_On,0));
    visdelay__state.percent=-1;
  }
  visdelay__state.count++;
  if (!visdelay__exit)
  {
    atexit(_dllEntry(visdelay__exitHandler));
    visdelay__exit=TRUE;
  }
}

/*
 * void visdelay_end(void)
 *
 * Use
 *  Turns off the hourglass.  Note that calls to visdelay_begin() and
 *  visdelay_end() must be matched.
 */

void visdelay_end(void)
{
  if (visdelay__state.count)
  {
    visdelay__state.count--;
    wimpt_noerr(_swix(XHourglass_Off,0));
  }
}

/*
 * void visdelay_percent(int percent)
 *
 * Use
 *  Puts up the little percentage indicator on the hourglass.
 *
 * Parameters
 *  int percent == the percentage number to indicate.
 */

void visdelay_percent(int percent)
{
  wimpt_noerr(_swix(XHourglass_Percentage,_in(0),percent));
  visdelay__state.percent=percent;
}

/*
 * visdelay_state visdelay_suspend(void)
 *
 * Use
 *  Turns the hourglass right off.  It also returns information about the
 *  current state of the hourglass so that it can be resumed.
 *
 * Returns
 *  State information recorded in an undefined manner.
 */

visdelay_state visdelay_suspend(void)
{
  visdelay_state c=visdelay__state;
  wimpt_noerr(_swix(XHourglass_Off,0));
  visdelay__state.count=0;
  return (c);
}

/*
 * void visdelay_resume(visdelay_state state)
 *
 * Use
 *  Returns the hourglass to the state it was in when the last
 *  visdelay_suspend() call was made.
 *
 * Parameters
 *  visdelay_state state == the hourglass state as returned by
 *  visdelay_suspend().
 */

void visdelay_resume(visdelay_state state)
{
  visdelay__state=state;
  if (visdelay__state.count)
  {
    wimpt_noerr(_swix(XHourglass_On,0));
    wimpt_noerr(_swix(XHourglass_Percentage,_in(0),visdelay__state.percent));
  }
}